Getting the full address of an interface item
There are a number of keyboard shortcuts you can use to copy different forms of fields and components out of the interface.

The simplest is Ctrl+C - this copies the value of the field (eg, 0.0).

The next is Ctrl+Shift+C - this copies the local path to that value (eg, location).

Finally, you can use Ctrl+Shift+Alt+C - this copies the absolute path to that value (eg, bpy.data.objects["Cube"].location[0]).